DataSheet26.com

LC7851 PDF даташит

Спецификация LC7851 изготовлена ​​​​«Sanyo Semicon Device» и имеет функцию, называемую «QPSK Demodulation and Audio Signal-Processing IC for Satellite Broadcast Reception».

Детали детали

Номер произв LC7851
Описание QPSK Demodulation and Audio Signal-Processing IC for Satellite Broadcast Reception
Производители Sanyo Semicon Device
логотип Sanyo Semicon Device логотип 

9 Pages
scroll

No Preview Available !

LC7851 Даташит, Описание, Даташиты
Ordering number : EN5691
CMOS LSI
LC7851E
QPSK Demodulation and Audio Signal-Processing IC
for Satellite Broadcast Reception
Overview
The LC7851E demodulates the QPSK (quadrature phase
shift keying) modulated audio data broadcast by the
Japanese BS and CS broadcast satellites and converts that
data to an analog audio signal. This IC integrates on a
single chip the audio system signal processing required for
BS and CS receivers from QPSK demodulation to analog
audio reproduction. The main functions provided by the
LC7851E include QPSK demodulation, differential
decoding conversion, descrambling, deinterleaving, and
error correction. It also generates a PCM audio signal. The
PCM audio signal is converted to an analog audio signal
by on-chip digital filters and A/D converters.
Features
• QPSK demodulator, PCM decoder, digital filters, D/A
converters, and operational amplifiers integrated on a
single chip.
• The number of required external components has been
reduced and adjustment-free operation achieved in the
QPSK demodulator by implementing that block as a
digital circuit on a single chip.
• CPU interface using an I2C bus
• Interface circuits for CORTEC and SkyPort
descramblers
Functions
• QPSK demodulation
• Bit timing clock recovery
• Differential decoding conversion and parallel-to-serial
conversion
• Frame synchronization (forward protection: 8 cycles,
back protection: 3 cycles): Frame synchronized/not
synchronized detection flag output provided.
• Tenth-order M-series descrambling
• Deinterleaving
• BCH (63, 56) error correction and dual error detection:
Single error detected flag output provided.
• Support for both interpolation and previous data hold
when a dual error is detected.
Control bit majority judgment protection every 16
frames
• Register data previous value hold when dual errors are
detected using BCH(7,3)
• Ten to 14 bit expansion of audio data during A mode
broadcasts.
• Data protection using majority control for the upper bits
of the audio data during B mode broadcasts
• Full complement of muting functions
— Audio suppression provided (bit 16 of the post-
majority decision control bits)
— Non-audio signal suppression (bits 2 to 5 of the post-
majority decision control bits)
— Forced muting
— Muting when not synchronized
— Muting when large numbers of errors are detected
(modifiable conditions)
— Channel switching
— Charged (pay-per-view) program flag muting
— Mute detection output provided.
• General-purpose ports (2 input ports and 8 output ports)
• EIAJ digital audio interface output
• 8× oversampling digital filters
• Multi-bit D/A converter (with built-in output operational
amplifiers)
• 5 V single-voltage power supply
• QFP (QIP) 64E package
Package Dimensions
unit: mm
3195-QFP64E
[LC7851E]
SANYO: QIP64E
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
83097HA(OT) No. 5691-1/9









No Preview Available !

LC7851 Даташит, Описание, Даташиты
Block Diagram
LC7851E
No. 5691-2/9









No Preview Available !

LC7851 Даташит, Описание, Даташиты
Pin Assignment
DVSS
LC7851E
VSS
VDD
PVSS
PVDD
VVDD
VVSS
AVSS
Pin Functions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Pin
BSTRI
BSTRO
P7
P6
P5
P4
P3
P2
P1
P0
CK5M
DVDD
TSL
AVSS
QPSKI
AVDD
VRM
AVSS
VRB
VCADJ
VCIN
I/O Function
I Bit stream input
O Bit stream output
O General-purpose output port
O General-purpose output port
O General-purpose output port
O General-purpose output port
O General-purpose output port
O General-purpose output port
O General-purpose output port
O General-purpose output port
O Filter adjustment clock output (5.7272 MHz)
I Digital system power supply
I Output control for the state when reset by the PHCNT pin (Low: high-impedance, high: 50% duty pulse output)
I Internal A/D converter ground
I QPSK modulated signal input
I Internal A/D converter power supply
O Internal A/D converter reference (center) output
I Internal A/D converter ground
O Internal A/D converter reference (low) output
Connection for internal VCO adjustment external resistor
I Internal VCO control input
Continued on next page.
No. 5691-3/9










Скачать PDF:

[ LC7851.PDF Даташит ]

Номер в каталогеОписаниеПроизводители
LC7851QPSK Demodulation and Audio Signal-Processing IC for Satellite Broadcast ReceptionSanyo Semicon Device
Sanyo Semicon Device
LC7851EQPSK Demodulation and Audio Signal-Processing IC for Satellite Broadcast ReceptionSanyo Semicon Device
Sanyo Semicon Device

Номер в каталоге Описание Производители
TL431

100 мА, регулируемый прецизионный шунтирующий регулятор

Unisonic Technologies
Unisonic Technologies
IRF840

8 А, 500 В, N-канальный МОП-транзистор

Vishay
Vishay
LM317

Линейный стабилизатор напряжения, 1,5 А

STMicroelectronics
STMicroelectronics

DataSheet26.com    |    2020    |

  Контакты    |    Поиск